I kinda like it with colour. It has just enough colour to put a bit of warmth in the picture, and it gives the character a subtle spark. And it looks like it's shimmering, which really looks good on the cloth and armor.

Backgrounds are difficult, but I really like what you did. It gives the picture as a whole a good sense of movement, which I think goes well with the swirly sphere that she's summoning. And the way the cloth bends along with the background, yet at the same time, crisscrossing in a soft perpendicular manner... It works so well.